US9062733B2 - Gas spring oil reservoir - Google Patents
Gas spring oil reservoir Download PDFInfo
- Publication number
- US9062733B2 US9062733B2 US13/428,097 US201213428097A US9062733B2 US 9062733 B2 US9062733 B2 US 9062733B2 US 201213428097 A US201213428097 A US 201213428097A US 9062733 B2 US9062733 B2 US 9062733B2
- Authority
- US
- United States
- Prior art keywords
- spacer
- housing
- gas spring
- sealing devices
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
- F16F9/0218—Mono-tubular units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/365—Special sealings, including sealings or guides for piston-rods the sealing arrangement having a pressurised chamber separated from the damping medium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49609—Spring making
Definitions
- the present invention relates generally to the field of gas springs. It relates more particularly to gas springs using oil during operation.
- Gas springs are often used in applications that reduce the forces required to move an object, such as doors or panels which rotate about a horizontal axis when raised and would otherwise require a lifting force due to gravity acting on the door or panel.
- Gas springs contain a pressurized gas acting on a piston positioned inside of the housing of the gas spring.
- a rod connected to the piston variably extends exterior of the housing in response to the force generated by the pressurized gas against the piston.
- An amount of oil is contained within the housing between the piston and the end of the housing through which the rod extends to help maintain a seal between the rod and the housing to prevent escape of the pressurized gas.
- the present invention relates to a gas spring including a housing having an end configured to receive a rod therethrough, the rod connected to a piston movably positionable within the housing.
- a pair of sealing devices and a spacer separate the sealing devices and form a compartment containing oil near the end of the housing, the compartment having a first portion and a second portion.
- the first portion is defined by the sealing devices, the spacer and the rod.
- the second portion is defined by the sealing devices, the spacer and the housing.
- the first portion is in fluid communication with the second portion permitting circulation of oil therebetween.
- the present invention further relates to a method for assembling a gas spring including providing a housing having an open end and a closed end.
- the method further includes inserting a piston connected to a rod inside of the open end, the piston movably positionable between the open end and the closed end.
- the method further includes positioning a spacer between a pair of sealing devices inside the open end, the spacer and the pair of sealing devices defining a compartment having a first portion and a second portion.
- the first portion is defined by the sealing devices, the spacer and the rod.
- the second portion is defined by the sealing devices, the spacer and the housing.
- the first portion is in fluid communication with the second portion.
- the method further includes introducing an amount of oil in at least one of the first portion and the second portion and securing the compartment near the open end of the housing.
- the method further includes introducing pressurized gas inside the housing between the piston and the closed end of the housing.
- An advantage of the present invention is the ability to operate the gas spring in any orientation, while maintaining the seal in contact with oil, thereby improving the operation and useful life of the seal.
- Another advantage of the present invention is the ability to circulate the oil between two chamber portions, providing improved heat dissipation capabilities.
- FIG. 1 shows a side view of an exemplary embodiment of a gas spring of the present disclosure.
- FIG. 2 shows an enlarged partial view of an end of the gas spring taken from region 2 of FIG. 1 of the present disclosure.
- FIG. 3 shows an exemplary embodiment of a spacer of a gas spring of the present disclosure.
- FIG. 4 shows an exemplary embodiment of a spacer of a gas spring of the present disclosure.
- FIG. 5 shows an enlarged partial view taken from region 5 of FIG. 2 of an exemplary embodiment of the gas spring of the present disclosure.
- FIG. 6 shows an exemplary embodiment of a spacer of a gas spring of the present disclosure.
- FIG. 1 shows a gas spring 10 including a housing 12 having opposed ends 18 , 20 .
- End 20 is configured to receive a rod 14 connected to a piston 16 that is movably positionable within housing 12 between opposed ends 18 , 20 by a pressurized gas (not shown) that is contained within housing 12 .
- sealing devices 24 include retention members 22 .
- the sealing devices 24 and retention members 22 are integrally formed, or stated another way, may be of unitary construction.
- sealing devices 24 are packings, also referred to as O-rings that are secured in corresponding annular slots formed in retention members 22 .
- sealing devices 24 are sized to accommodate sliding contact with the outer surface of rod 14 , while also maintaining a fluid tight seal therebetween to prevent the escape of pressurized gas from housing 12 . Additionally, by virtue of the sliding fluid tight seal formed between sealing devices 24 and the outer surface of rod 14 , the outer surface of rod 14 is “wiped clean” and substantially prevents introduction of contaminants, such as dirt particles, inside housing 12 of gas spring 10 while maintaining the fluid tight seal.
- an assembled gas spring 10 includes a compartment 26 having a first portion 30 and a second portion 32 .
- a suitable lubricating liquid such as an oil (not shown) may be introduced into at least one of first portion 30 and second portion 32 .
- oil substantially fills each of first portion 30 and second portion 32 .
- First portion 30 is defined by the outer surface of rod 14 , retention members 22 of sealing devices 24 , and an inner surface of spacer 28 .
- Second portion 32 is defined by an outer surface of spacer 28 , retention members 22 of sealing devices 24 , and an inner surface of housing 12 . In other words, spacer 28 separates first portion 30 from second portion 32 .
- spacer 28 separates first portion 30 from second portion 32 .
- first portion 30 and second portion 32 are in fluid communication with each other by virtue of openings 34 formed in spacer 28 .
- openings 34 oil is maintained in contact with both the outer surface of rod 14 and sealing devices 24 , which provides several benefits.
- the oil provides for smoother operation of gas spring 10 by reducing friction between the outer surface of rod 14 and sealing devices 24 , which also results in extending the service life of the gas spring 10 .
- the rate at which pressurized gas permeates the seal and escapes is slowed, also extending the service life of the gas spring 10 .
- first and second portions 30 , 32 maintaining oil in contact with the outer surface of rod 14 and sealing devices 24 irrespective of the orientation of the gas spring 10 , gas spring 10 is not limited to a “rod-down” orientation.
- first and second portions 30 , 32 permitting circulation 44 by virtue of openings formed in spacer 28 , the amount of thermal energy that may be removed during operation of the gas spring is increased.
- housing 12 secures compartment 26 . That is, a constriction 42 is formed in the housing 12 to secure one retention member 22 of sealing device 24 , and the end 20 is also deformed, such as by cramping to secure the opposed retention member 22 of sealing device 24 .
- the compartment may be secured near, but not necessarily at the end of the housing, permitting multiple compartments to be constructed and secured, if desired.
- secure indicates that a fluid tight seal is formed between the facing surfaces of the elements being brought together.
- spacer 28 includes a pair of corresponding openings 34 , such as slots or slotted openings formed in each of opposed ends 38 , 40 of spacer 28 .
- spacer 28 includes a positioning feature 36 , such as a pair of opposed protrusions extending outwardly from spacer 28 .
- Such protrusions perform the function of substantially centering spacer 28 , while maximizing the volume of second portion 32 ( FIG. 2 ), and permitting recirculation 44 between first portion 30 and second portion 32 .
- Positioning feature 36 may include other embodiments.
- spacer 128 may be centered by forming a recess 46 , such as an annular groove in retention member 22 of sealing device 24 .
- FIG. 4 shows an alternate embodiment of spacer 128 including openings 34 formed near opposed ends 38 , 40 .
- the spacer may include a single opening.
- FIG. 6 shows a further alternate embodiment of spacer 228 , in which passageways 48 formed in one or both surfaces of spacer 288 may extend in a predetermined path, such as a spiral direction between openings 34 in order to enhance the amount of recirculation of the oil.
- the passageway may not terminate at the openings.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/428,097 US9062733B2 (en) | 2012-03-23 | 2012-03-23 | Gas spring oil reservoir |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/428,097 US9062733B2 (en) | 2012-03-23 | 2012-03-23 | Gas spring oil reservoir |
Publications (2)
Publication Number | Publication Date |
---|---|
US20130249151A1 US20130249151A1 (en) | 2013-09-26 |
US9062733B2 true US9062733B2 (en) | 2015-06-23 |
Family
ID=49211062
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/428,097 Expired - Fee Related US9062733B2 (en) | 2012-03-23 | 2012-03-23 | Gas spring oil reservoir |
Country Status (1)
Country | Link |
---|---|
US (1) | US9062733B2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1510699A (en) * | 1974-06-18 | 1978-05-10 | Philips Nv | Assembly comprising two concentric relatively rotatable members with a seal between them |
US4108423A (en) * | 1976-07-19 | 1978-08-22 | Atwood Vacuum Machine Company | Gas spring |
DE3702581A1 (en) * | 1987-01-29 | 1988-08-11 | Stabilus Gmbh | Sealing of a piston rod |
US5086691A (en) * | 1989-10-19 | 1992-02-11 | Societe Des Usines Quiri & Cie | Gas compression device having isolated compression and lubrication chambers |
US20110042173A1 (en) * | 2009-08-18 | 2011-02-24 | Magneti Marelli Cofap Companhia Fabricadora De Pecas | Hydraulic Damper for a Vehicle Steering System |
-
2012
- 2012-03-23 US US13/428,097 patent/US9062733B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1510699A (en) * | 1974-06-18 | 1978-05-10 | Philips Nv | Assembly comprising two concentric relatively rotatable members with a seal between them |
US4108423A (en) * | 1976-07-19 | 1978-08-22 | Atwood Vacuum Machine Company | Gas spring |
DE3702581A1 (en) * | 1987-01-29 | 1988-08-11 | Stabilus Gmbh | Sealing of a piston rod |
US5086691A (en) * | 1989-10-19 | 1992-02-11 | Societe Des Usines Quiri & Cie | Gas compression device having isolated compression and lubrication chambers |
US20110042173A1 (en) * | 2009-08-18 | 2011-02-24 | Magneti Marelli Cofap Companhia Fabricadora De Pecas | Hydraulic Damper for a Vehicle Steering System |
Also Published As
Publication number | Publication date |
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US20130249151A1 (en) | 2013-09-26 |
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Owner name: CNH AMERICA LLC, PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SWENSON, RYAN LEE;REEL/FRAME:027916/0199 Effective date: 20120321 |
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Owner name: BLUE LEAF I.P., INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CNH INDUSTRIAL AMERICAL LLC;REEL/FRAME:036238/0229 Effective date: 20150729 |
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Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20230623 |